Design of subwavelength superscattering nanospheres

We design a subwavelength superscattering nanosphere with plasmonic-dielectric-plasmonic layer structure. We show that the scattering cross section of such a particle can be significantly enhanced by employing multiple resonances with different total angular momenta, and by ensuring that all these resonances have almost the same frequency and operate in the overcoupling region. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3536475]